Neuroscientists at the University of California-Irvine are so fascinated by Brad Williams' capacity for total recall, they have scanned his brain. The scientists hope to deepen their knowledge about autobiographical memory, one of the least-understood functions of the human brain. (Audio slideshow by Aristide Economopoulos and story by Amy Ellis Nutt) Go here at noon on Monday, Dec. 10, to talk about this series with Star-Ledger staff writer Amy Ellis Nutt. (Audio slideshow by Debby Berger and Bumper DeJesus, photos by Aristide Economopoulos)